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      LOCAL CYTONUCLEAR EXTINCTION OF THE GOLDEN-WINGED WARBLER.

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          Abstract

          I compared the mtDNA compositions of two adjacent populations of Vermivora chrysoptera (golden-winged warbler) at different stages of transient hybridization with its sister species V. pinus (blue-winged warbler). Pinus mtDNA introgresses asymmetrically and perhaps rapidly into chrysoptera phenotypes without comparable reverse introgression of chrysoptera mtDNA into replacing pinus populations. Pinus mtDNA was virtually fixed (98%) in an actively hybridizing lowland population with varied phenotypes. Pinus mtDNA increased from 27% (n = 11) in 1988 to 70% (n = 10) in 1992 in successive samples of a highland population in the initial stages of hybridization. This population comprised mostly pure and slightly introgressed chrysoptera phenotypes. The rapid pace of asymmetrical introgression may be the result of initial invasion of chrysoptera populations by pioneering female pinus and/or an unknown competitive advantage of pinus females and their daughters over chrysoptera females.

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          Author and article information

          Journal
          Evolution
          Evolution; international journal of organic evolution
          Wiley
          1558-5646
          0014-3820
          Apr 1997
          : 51
          : 2
          Affiliations
          [1 ] The Academy of Natural Sciences, 1900 Benjamin Franklin Parkway, Philadelphia, Pennsylvania, 19103-1195.
          Article
          10.1111/j.1558-5646.1997.tb02439.x
          28565355
          b903e1b1-92d5-4965-9987-171aebb219d6
          © 1997 The Society for the Study of Evolution.
          History

          transient hybridization,species replacement,mitochondrial DNA,golden-winged warbler,cytonuclear disequilbria,Vermivora.,Neotropical migrant,Blue-winged warbler

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